Answer:
(A) The main properties of water are its polarity, cohesion, adhesion, surface tension, high specific heat, and evaporative cooling.
(B) (1) Water is the medium for various enzymatic & chemical reactions in the body.
(B) (2) Waters high specific heat enables it to act as an absorber of heat inside an organisms body. -
(B) (3) Transpiration is the loss of water from a plant in the form of water vapor.
(B) (4)Because of its polarity and ability to form hydrogen bonds, water makes an excellent solvent, meaning that it can dissolve many different kinds of molecules.
Explanation:
(A) A water molecule is slightly charged on both ends. This is because oxygen is more electronegative than hydrogen.
(B) (1) It moves nutrients, hormones, antibodies and oxygen through the blood stream and lymphatic system. The proteins and enzymes in our body function more efficiently in solutions of low viscosity.
(B) (2) Waters high heat of vaporization allows the body to cool by perspiring. When the water evaporates off the skin a lot of heat is absorbed. Explain the movement of water from the roots to the leaves of plants.
(B) (3) Water is absorbed by roots from the soil and transported as a liquid to the leaves via xylem. In the leaves, small pores allow water to escape as a vapor.
